Mining process.



PATENTED FEB. 4, 1908.

J. KIRSOHNIOK.

MINING PROCESS.

APPLIGATION FILED MAY 27. 1904.

mums STATES ATE T. OFFICE.

JACOB KIRSCHNIOK, OF ZABRZE, GERMANY. l

MINING PROCESS.

Specification of Letters Patent.

N maeoe.

Patented Feb. 4, 1908.

Application filed May 27. 190% 8Iill N0- Zl0.019. I

To all whom it may concern:

Be it known that I, JAooB Krnsonmoir, mining engineer, of Zabrze, UpperSilesia, in the Kingdom of Prussia, Germany, have invented a new Mining.Process, of which the following is a specification.

mining-process and more particularly to a cutting process, that is tosay to a process \for the production of incisions for facilitating theobtaining. or coal or the like. Such incisions or holings have hithertobeen produced by meansof the wedge-pick, the cutting-par or by means ofthe coal-cutting machines. Apart from the dilliculty and expensivenessof this work, a great deal, of dust is naturally formed by the same andit is quite certain that the majority ol explosions arecaused bycoal-dust resulting from these incisions. a

By means of the roccss according to the present invention, t e work ofmaking these incisions is extraordinarily simplified and water jet,particularly in salt mining and in gold mining. Nevertheless this lattera lication is distinguished fundamentally rom the process according tothe present invention.

In carrying out the presentproccss, the natural pressure of a highcolumn of water can be employed with advantage, as the working of coalscams mostly occurs at great dcpthsl This pressure can by means i ofpumps be further considerably increased up tolOO atmospheres and over.

If a coal-seam is to be separated from the overlying and underlying,rock, the blastholes iorun-ed at the upper and lower boundaries of thecoal-seam. In the majority of cases, as the rock is mostly harder thanthe coal, the blast-holes will be made in the The'present inventionrelates to a new I the pro notion of the blast-holes is of no im.-portance at all. If on the contrary the rock can be worked by thewater-'et to greater advantage, it will be prefera le to form theblast-hole in the rock, naturally always close to the boundary of thecoal-seam.

be like- The high-pressure water jet can wise advantageously employedalso for the production of the bl ast-holes in the coal-seam itself. Thecoal-seams can in this manner be divided into-strips, which can then beeasily severed by the, introduction of explosives.

. The accompanying drawing illustrates the application of apparatus to acoal-seam for 't is carrying out of the present invention.

Referring to this drawin 7c is the coalcoal es ecially as the loss inmaterial through seam and g 9 denote the'over lying and underlying rock,8, s are the incisions or blast-holes and a, b, 0 represent themouth-pieces of the devices serving for the carryin out of the presentprocess. By means of t e dance or pipe-support provided with themouthiece a, an incision is made at the device wit the mouth-piece c anincision is made at the boundary of the underlying rock. By means of thedevice with the mouthiece b an incision is worked into the midd e of thecoalseam. The coal-seam is 'in this manner -divided into two strips,which can be easily blasted'ofi Several incisions can of course beworked in'the'coal-seam itself,,and the coaLseam be cut-into severalstri s. This method can be suitably em 10 e in cases where the seams arevery tli'cli. In cases where thereare two seams which are sepa rated byan interval of only slight thickness, the incision is naturally arrangedin this inter val, so that by the formation of the incision a doubleeffect is obtained.

In the case of seams of slight thickness, it

will suffice, in the. majority of cases, for the incision to be workedat the boundary of the overlying or at the boundary of the underlyingrock,.so that in these cases, the device with the mouth-piece b willaccordingly not be used. b

As the result of experime'ntit has been shown that with a pressure ofabout 30 atmospheres, a water jet of 3 millimeters thick-- ness is mostadvantageous.

The more the pressure is increased, the finer naturally can the waterjet be and the greater'f'is the cutting or sawingaction of the same WhatI claim is:

1. The process T minerals which con more fine jets XVfLtvl' u sureagainst the miners hole or cut is desired.

2. The process minerals which con 1n delivering one or more fine jets ofWater under a pl'essuge of from 50 to 100 atmospheres against the minicutting holes or slots in in the direction which the hole or cut isdesired and in close proximity to the mineral surface on which the jetsets.

In witness whereof I have hereunto set my hand in presence of twoWitnesses.

JACOB KIRSCHNIOK.

Witnesses CARL ILGNER, FRITZ HULDscHINsKY.

